EP0836002B1 - Vorrichtung zur Wärmeübertragung zwischen strömenden Medien für eine Brennkraftmaschine - Google Patents
Vorrichtung zur Wärmeübertragung zwischen strömenden Medien für eine Brennkraftmaschine Download PDFInfo
- Publication number
- EP0836002B1 EP0836002B1 EP97116598A EP97116598A EP0836002B1 EP 0836002 B1 EP0836002 B1 EP 0836002B1 EP 97116598 A EP97116598 A EP 97116598A EP 97116598 A EP97116598 A EP 97116598A EP 0836002 B1 EP0836002 B1 EP 0836002B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat
- coolant
- conduit
- combustion engine
- internal combustion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 85
- 239000012530 fluid Substances 0.000 title description 4
- 239000002826 coolant Substances 0.000 claims description 96
- 239000000446 fuel Substances 0.000 claims description 50
- 238000012546 transfer Methods 0.000 claims description 24
- 238000009826 distribution Methods 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 17
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims 1
- 239000007769 metal material Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 96
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 238000013461 design Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 230000001427 coherent effect Effects 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
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- 230000007812 deficiency Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0234—Header boxes; End plates having a second heat exchanger disposed there within, e.g. oil cooler
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/32—Liquid-cooled heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/16—Other apparatus for heating fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
- F02M35/10072—Intake runners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
- F02M35/10111—Substantially V-, C- or U-shaped ducts in direction of the flow path
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
- F02M35/10144—Connections of intake ducts to each other or to another device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
- F02M35/10216—Fuel injectors; Fuel pipes or rails; Fuel pumps or pressure regulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
- F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/104—Intake manifolds
- F02M35/112—Intake manifolds for engines with cylinders all in one line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/12—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems characterised by means for attaching parts of an EGR system to each other or to engine parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the invention relates to a device for heat transfer between flowing media for an internal combustion engine the preamble of claim 1.
- DE-PS 30 34 971 C2 discloses a two-channel heat exchanger for an internal combustion engine, which both from Coolant of the internal combustion engine as well as from one to the Return to the intake system provided exhaust gas flow is flowed through.
- the heat exchanger consists of an elongated, two-part housing, one at each end Opening for the inlet or outlet of the coolant flow is arranged is.
- Within the thus forming a coolant channel Housing is U-shaped with parallel to the coolant channel extending legs an exhaust gas duct arranged, the channel wall a heat conducting wall inside of the heat exchanger, which is the exhaust duct on the one hand and the coolant channel on the other hand limited and by both media is smeared.
- An inlet opening of the exhaust duct in The housing of the heat exchanger is connected to the exhaust pipe Internal combustion engine connected, and an exhaust port of the exhaust duct opens into the air supply of a carburetor, so that the exhaust duct in the heat exchanger is an exhaust gas recirculation line represents the internal combustion engine.
- the object of the invention is therefore to provide a device for Transfer of heat between different flowing media To create temperatures for an internal combustion engine which with the advantage of compact design in one component allows multiple heat transfer processes.
- fuel to be supplied to the internal combustion engine is achieved in that through an opening in the outer wall a heat exchanger with an exhaust gas of the internal combustion engine leading exhaust duct and a parallel to the exhaust duct, Coolant of the internal combustion engine leading coolant channel, which each through a heat conducting wall inside of the heat exchanger are separated, one from fuel flow-through heat exchange container in the coolant channel protrudes.
- the heating of the fuel prevents staining of diesel fuel at low outside temperatures and increases the ignitability of the engine supplied Fuel.
- the heat exchanger tank is part of one arranged in the fuel line of the internal combustion engine Fuel distributor, which has a thermostat for control one conductive for heating by the heat exchanger tank Has partial power flow.
- the thermostat controls the Fuel distribution such that when a certain one is reached Fuel temperature less fuel as a result a flow through the fuel tank is heated and thus preventing the formation of vapor bubbles.
- the exhaust duct of the heat exchanger is preferably part of one Exhaust gas recirculation line of the internal combustion engine, which from. a controllable exhaust gas recirculation valve is mastered.
- the Heat transfer from the exhaust gas to the coolant of the internal combustion engine causes the exhaust gas to be recycled to cool down, what after the admixture of the recirculated exhaust gas in the Fresh air to be supplied to cylinders of the internal combustion engine
- the temperature of the combustion air mixture is reduced. Consequently is the tendency that occurs increasingly with higher temperatures for the formation of nitrogen oxides from the gas components inhibited the combustion air.
- the coolant is after the flow through the coolant channel preferably one Waste heat from the internal combustion engine device to Example, the heat exchanger of a vehicle heater, supplied.
- the exhaust gas duct and the coolant duct run in the heat exchanger side by side, with the heat conducting wall for transmission of heat from the exhaust gas to be returned to the coolant between opposite sections of the outer wall of the Heat exchanger runs and separates the channels.
- the opening in the outer wall lies in the coolant channel of the heat conducting wall across from.
- the opening in the outer wall of the heat exchanger is in the end section the intended heat exchange path in the flow direction arranged, whereby the heat exchanger tank of Fuel distributor adjacent the outlet of the coolant channel protrudes and thus from the largest possible Temperature heated coolant flow is washed around.
- the ribs are preferably between the inlet of the Coolant channel and about the section of the heat conducting wall, which is essentially the heat exchanger tank of the fuel rail lies opposite, arranged and promote the rapid warming of the coolant flow before reaching the Fuel heat exchanger. It can also be beneficial measures to increase heat transfer on the flue gas side, for example by the arrangement of in the exhaust duct protruding ribs arranged on the heat conducting wall and connected to it in a heat-conducting manner or molded onto it are.
- the heat exchanger is preferably made of aluminum, which known to be an excellent material with high strength Has thermal conductivity, so that in the heat exchanger a high heat flow from the exhaust gas through the heat conducting wall can flow into the coolant.
- the heat exchanger advantageously carried out as a one-piece cast component and can be produced, for example, in the sand mold casting process.
- the heat exchanger is advantageous with the exhaust gas recirculation line and with the coolant line of the internal combustion engine coupled that the exhaust duct and the coolant duct are flowed in the same direction. This makes it special low integration of the heat exchanger into allows both pipes and the temperatures of the exhaust gas and the coolant logarithmically approach each other, the temperature of the coolant in the range in the Coolant channel protruding fuel heat exchanger largest is. Another advantage of flow in the same direction the channels in the heat exchanger are opposed to countercurrent heat transfer to see that the wall temperatures remain in the arithmetic middle range at all points. However, there can also be an opposite flow through the Exhaust gas channel and the coolant channel can be provided, wherein a comparatively higher heat flow is transferable and thus a better efficiency of the heat exchanger can be achieved is.
- Heat exchanger in a particularly compact design in one assembly integrated gas-carrying lines of the internal combustion engine, which from the exhaust gas recirculation line and such Lines exist, which the internal combustion engine fresh gas feed, namely the one cylinder of the internal combustion engine Fresh gas supplying fresh gas lines and one the distribution line feeding the fresh gas lines.
- This fresh gas-carrying lines of the assembly are advantageous made of the same material, so that one piece cost-effective production is achieved.
- the resulting cohesive assembly is fast and open easiest way to manufacture an internal combustion engine mountable.
- the cylinder flange connects the Inlet side of the heat exchanger and the fresh gas lines with the corresponding outlet openings of the cylinders, and the inlet flange connects those coming from the heat exchanger Exhaust gas recirculation line and the distribution line with one Mixed housing.
- the Exhaust gas recirculation valve is in a pipe fitting arranged, which on the one hand with the input flange Exhaust gas recirculation line is connected and on the other hand in the mixing housing opens.
- the combustion air mixture formed in the mixing housing consisting of recirculated exhaust gas and oxygen-rich fresh air is through the manifold and the fresh gas lines to the cylinders of the internal combustion engine fed.
- the pipe fitting with the exhaust gas recirculation valve and the mixing housing a common one Form part.
- Fig. 1 is a device 1 for heat transfer between flowing fluids of a motor vehicle drive serving internal combustion engine shown.
- the device 1 extracts heat from an exhaust gas stream of the internal combustion engine, which depends on the coolant circulating in the cooling line system is transmitted.
- the heat transported by the coolant in turn can be used to preheat fuel before introduction into the combustion chambers of the internal combustion engine and for heating of the interior can be used by a vehicle heater.
- the device 1 comprises a two-channel heat exchanger 2, inside it, side by side and parallel, an exhaust duct 3 and a coolant channel 4 run.
- the exhaust duct 3 is Part of an exhaust gas recirculation line of the internal combustion engine and is through a flat heat conducting wall 5 from the coolant channel 4 separated.
- In the outer wall 6 of the heat exchanger 2 is opposite the heat conducting wall 5 introduced an opening 7 through which is a trough-like heat exchanger tank 8 of a fuel rail 9 protrudes into the coolant channel 4.
- the fuel rail is in the fuel line 20 Internal combustion engine arranged, the metered fuel partial flow is removable and for heating in the heat exchanger tank 8 is conductive.
- the regulation of the dosage is carried out by a control thermostat inside the fuel rail 9, which is excessive heating of the Avoids fuel supplied to the internal combustion engine.
- the housing of the fuel distributor 9 projects beyond the outer dimensions of the heat exchanger tank 8 and the opening 7 of the outer wall 6 and is therefore on the outside of the heat exchanger 2nd on.
- the exhaust duct 3 and the coolant duct 4 are in the same direction flows in the direction of arrow 24, 25, with logarithmic Approximation of fluid temperatures low mean Temperatures of the heat conducting wall 5 and of the whole, made of aluminum existing heat exchanger 2 result.
- the opening 7 in the outer wall 6 of the heat exchanger 2 is in Flow direction 24 in the end section of the coolant channel 4 attached so that the heat exchanger tank 8 of the fuel rail 9 protrudes into the already heated coolant flow.
- Such an arrangement of fins is also possible in the exhaust duct 3, the Ribs on the heat-conducting wall 5 in a good heat-conducting connection attached or integrally formed on this.
- the outer wall 6 of the heat exchanger 2 is in alignment with the Heat conducting wall 5 inside the heat exchanger 2 over the end the coolant channel 4 out and points in their End portion a flange 26 for connection to another Pipe section of the exhaust gas recirculation line.
- An exit port 14 leads in the end section of the coolant channel 4 the heated coolant from the heat exchanger 2 at right angles to the flow direction 24, as is clear from FIG. 2 evident.
- FIG. 1 Here is a top view of a device 1 shown for heat transfer of the heat exchanger 2 the outer wall of the fuel distributor 9 with connection to the fuel line 20 of the internal combustion engine is present. Between the inlet side 15 of the heat exchanger 2 and the Fuel distributors 9 protrude from the invisible heat conducting wall shown in dashed lines inside the heat exchanger 2 Ribs 10 into the coolant channel. The ribs 10 are in axial rows in parallel Direction of the heat exchanger 2 arranged.
- FIG. 3 and 4 show the device described in FIG. 1 1 for heat transfer between the exhaust gas to be recirculated and the coolant on the one hand and the coolant and the Fuel to be supplied to the internal combustion engine, on the other hand, which in a common assembly of the fresh air of the internal combustion engine supply lines 11, 12 is integrated.
- 3 in a section along the line IV-IV in FIG. 4 shows the axial alignment of the heat exchanger in Flow direction of the exhaust duct 3 and the coolant duct 4 inside the heat exchanger 2 orthogonal to a distributor line 12, which the inlet mass flow of Fresh gas for the internal combustion engine leads and to several Fresh gas lines 11 to the cylinders of the internal combustion engine distributed.
- the exhaust duct 3 of the heat exchanger 2 is part an exhaust gas recirculation line of the internal combustion engine, which in the continuation in the flow direction of the heat exchanger 2 Part over the end of the heat exchange path of the heat conducting wall 5 with an orthogonal to the flow direction arranged outlet 14 of the coolant channel 4 up to the distribution line 12 is brought up.
- the exhaust gas recirculation line is directly after the exhaust duct 3 of the Angled heat exchanger 2 and is parallel in the further course led to the distribution line 12. To improve the The exhaust gas recirculation line is parallel in its stability attached to the distribution line 12 section attached to this.
- the fresh gas lines 11 are orthogonal to both the flow direction of the heat exchanger 2 and the flow direction the distribution line 12 from the distribution line 12 led out and run curved siphon to an end section, which is approximately on a common Height of the heat exchanger 2 and the distribution line 12 is provided is.
- the mouths of the fresh gas lines 11 are on attached to a cylinder flange 16, which also with the inlet side of the heat exchanger 2 is connected to the both the coolant in the coolant channel 4 and that Exhaust gas to be recycled can be admitted into the exhaust duct 3.
- the Cylinder flange 16 is attached to the internal combustion engine in such a way that between the fresh gas lines 11 and corresponding Inlet openings of the cylinders of the internal combustion engine, the exhaust duct 3 of the heat exchanger 2 and one in the exhaust pipe the exhaust gas recirculation line opening as well as between the coolant channel 4 of the heat exchanger 2 and the Coolant outlet of the internal combustion engine is fluid Connection is established.
- the common cylinder flange 16 is a very compact construction of a coherent Assembly 23 consisting of the distribution line 12, the fresh gas lines 11 to the cylinders of the internal combustion engine and the device 1 for heat transfer between the flowing media of the internal combustion engine.
- Fresh gas lines 11 and distribution line 12 also exist made of a light metal and are preferably in one piece made with the heat exchanger 2, making the compact device 1 is easy to handle with a low overall weight and in a simple manner through the cylinder flange 16 the engine is attachable.
- the siphon-like fresh gas lines 11 are on the arranged the side of the heat exchanger 2 having the exhaust gas duct 3, which is opposite the coolant channel 4.
- This side the heat exchanger 2 is easily accessible, so that maintenance the fuel rail 9 or manual adjustment its thermostats and the production of a fluidic Connection of the fuel distributor 9 and the fuel line 20 of the internal combustion engine is facilitated.
- the heat exchange tank 8 through the opening in the outer wall of the heat exchanger tank in the coolant channel 4 is inserted and the fuel distributor 9, the outer dimension of the fuel tank 8 and the opening towering over, forming a shoulder on the outer wall of the heat exchanger 2 is applied and attached.
- On this accessible side of the heat exchanger 3 can also have a the outlet 14 of the coolant channel 4 connected coolant line be arranged, which in the coolant channel 4th heated coolant of the internal combustion engine after flowing around the rising from the heat conducting wall 5 ribs 10 and Heat exchange container 8 of a vehicle heater for heating of the interior.
- Fig. 4 illustrates in a top view of the related Assembly 23 four parallel to each other Fresh gas lines 11a-d, which are orthogonal to the Fresh gas lines 11a-d arranged with distribution line 12 Fresh gas for the respectively assigned cylinders can be supplied.
- the device 1 for heat transfer which consists of a Heat exchanger 2 with an exhaust duct and a coolant duct and one in the coolant channel with a heat exchange tank protruding fuel distributor 9 is next to the parallel row the fresh gas lines 11a-d also parallel to this adjacent a closed end portion of the distribution line 12 arranged.
- the mouths of the fresh gas pipes 11a-d, from which fresh gas is assigned to the respective one Incoming cylinders of the internal combustion engine, and the input side of the heat exchanger 2 of the device 1 for heat transfer are connected to a common cylinder flange 16, which for fluidic connection with the corresponding Openings of the internal combustion engine can be attached to the cylinders is.
- the coolant heated after flowing through the heat exchanger 2 is from the coolant channel inside the heat exchanger 2 by an orthogonal to the flow direction arranged outlet pipe 14 discharged, and one (not illustrated) heat exchanger of a vehicle heater fed.
- the exit of the exhaust duct inside the Heat exchanger 2 is the further part of one Exhaust gas recirculation line 13 connected, which is adjacent to the Exit of the heat exchanger 2 is bent at right angles and in the further course parallel to the distribution line 12 is.
- the length of the run parallel to the distribution line 12 Section of the exhaust gas recirculation line 13 corresponds approximately the length of the manifold 12.
- the end section of the exhaust gas recirculation line 13 and the open end portion of the Distribution line 12 for the inlet of fresh gas are with a common inlet flange 17 which is perpendicular to Flow direction of both lines 12, 13 arranged is.
- the coherent is in a very compact design
- Assembly 23 formed with two mounting flanges 16, 17 and is in the simplest way with the cylinder flange 16 on the internal combustion engine on the one hand and with the inlet flange 17 attachable to a mixing housing 18.
- the assembly 23 is therefore quick in assembling a vehicle its drive unit can be installed.
- the exhaust gas recirculation line 13 opens into the mixing housing 18 with an adjustable exhaust gas recirculation valve 21, which for Example by a pipe fitting 19 on the inlet flange 17th on the one hand and on the mixing housing 18 on the other hand.
- an adjustable exhaust gas recirculation valve 21 which for Example by a pipe fitting 19 on the inlet flange 17th on the one hand and on the mixing housing 18 on the other hand.
- the oxygen content is dependent on the exhaust gas recirculation rate.
- the connected assembly 23 combines in a very compact Construction a variety of functions, which the quality guarantee the operating behavior of the internal combustion engine.
- the guidance of the exhaust gases in the exhaust gas recirculation line 13 and the fresh gases in the distribution line 12 and the fresh air lines 11a-d is very narrow and saves space and material.
- the length and siphon-like curvature of the fresh gas lines 11a-d (see FIG. 3) is however designed such that the distance between the cylinder flange 16 and the manifold 12 is so large that the one incorporated therein Heat exchanger 2 of the heat transfer device, the axial length this distance less the cross section of the Exhaust gas recirculation line 13 corresponds to a sufficiently long Provides heat transfer path.
- This heat transfer path corresponds to the extent of the heat conducting wall inside the heat exchanger in the direction of flow, through which a heat flow from the warmer exhaust gas in the exhaust gas to the Coolant is transmitted in the coolant channel.
- the Exhaust gas which is released via the exhaust gas recirculation line of the exhaust gas recirculation valve as part of the combustion air is fed back to the cylinders of the internal combustion engine, Extracted heat, after mixing the cooled exhaust gases with fresh air in the mixing housing combustion air with lower Temperature is prepared. As a result, low temperature from the formation of nitrogen oxides the components of the combustion air inhibited.
- the amount of heat extracted from the exhaust gas heats up after entry in the coolant channel, the coolant contained therein, which after exiting the heat exchanger, the amount of heat absorbed a vehicle heater for heating the vehicle interior feeds.
- the temperature may rise of the coolant are greatly accelerated and the vehicle heating supplied a sufficient amount of heat more quickly become.
- the heating of the Coolant in the heat exchanger proportional to the returned one Exhaust gas mass flow.
- the internal combustion engine during the warm-up phase due to the high exhaust gas recirculation rate of the vehicle heating in this case quickly provided the required amount of heat
- full-load operation of the internal combustion engine without exhaust gas recirculation there is no heat transfer to the coolant in the heat exchanger, but in this mode of operation causes a rapid warming of the coolant by the internal combustion engine even that sufficient heating operation for the vehicle interior is possible.
- the exhaust gas recirculation line is blocked by the exhaust gas recirculation valve in full load operation of the internal combustion engine the then undesirable additional heating of the coolant in the heat exchanger, causing an unnecessary temperature rise of the coolant leads, with an appropriate cooling capacity a coolant cooler must be met. at low ambient temperatures, for example in winter the internal combustion engine, is through the recuperative Providing heat quickly and effectively Vehicle heating given.
- Preheating fuel to increase ignitability or even at very low temperatures to produce the Ignitability is in the device according to the invention through the protruding into the coolant channel of the heat exchanger trough-like heat exchange container of a fuel distributor possible with compact, very space-saving design.
- the connected assembly with the integrated device for heat transfer is suitable both for the operation of supercharged internal combustion engines as well as from intake Internal combustion engines, each in either diesel or work in the Otto process.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Description
- Fig. 1
- einen Längsschnitt durch eine Vorrichtung zur Wärmeübertragung,
- Fig. 2
- eine Draufsicht einer Vorrichtung zur Wärmeübertragung,
- Fig. 3
- eine in das Frischgas-Leitungssystem der Brennkraftmaschine integrierte Vorrichtung zur Wärmeübertragung in einem Schnitt entlang der Linie IV-IV in Fig. 4,
- Fig. 4
- eine Draufsicht einer in das Frischgas-Leitungssystem einer Brennkraftmaschine integrierten Vorrichtung zur Wärmeübertragung.
Claims (13)
- Vorrichtung zur Übertragung von Wärme zwischen strömenden Medien unterschiedlicher Temperaturen für eine Brennkraftmaschine, insbesondere zum Antrieb von Kraftfahrzeugen, welche einen Wärmetauscher (2) mit einem Abgas der Brennkraftmaschine führenden Abgaskanal (3) und einem parallel zum Abgaskanal (3) verlaufenden, Kühlmittel der Brennkraftmaschine führenden Kühlmittelkanal (4) umfaßt, wobei eine Wärmeleitwand (5) im Inneren des Wärmetauschers (2) den Abgaskanal (3) einerseits und den Kühlmittelkanal (4) andererseits begrenzt,
dadurch gekennzeichnet, daß in einer Außenwand (6) des Wärmetauschers (2) eine Öffnung (7) vorgesehen ist, durch die ein an einem Kraftstoffverteiler (9) ausgebildeter Wärmetauschbehälter (8) in den Kühlmittelkanal (4) einragt und der Wärmetauschbehälter (8) vom der Brennkraftmaschine zuzuführendem Kraftstoff durchströmbar ist. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß der Abgaskanal (3) Teil einer Abgasrückführungsleitung (13) der Brennkraftmaschine ist, welche von einem regelbaren Abgasrückführungsventil (21) beherrscht ist. - Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Wärmeleitwand eben zwischen gegenüberliegenden Abschnitten der Außenwand (6) des Wärmetauschers (2) verläuft und den Abgaskanal (3) und den Kühlmittelkanal (4) voneinander trennt, wobei die Öffnung (7) der Außenwand (6) der Wärmeleitwand (5) im Kühlmittelkanal (4) gegenüberliegt. - Vorrichtung nach Anspruch 3,
dadurch gekennzeichnet, daß der Abgaskanal (3) und der Kühlmittelkanal (4) eine gemeinsame Einlaßseite (15) im Wärmetauscher (2) aufweisen. - Vorrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß an einen Auslaß (14) im Endabschnitt des Kühlmittelkanals (4) eine Kühlmittelleitung zu einer die Kühlmittelwärme nutzenden Einrichtung, insbesondere eine Fahrzeugheizung, anschließbar ist. - Vorrichtung nach Anspruch 5,
dadurch gekennzeichnet, daß der Wärmetauschbehälter (8) benachbart des Auslasses (14) des Kühlmittelkanals (4) angeordnet ist. - Vorrichtung nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet, daß sich aus der Wärmeleitwand (5) zwischen der Einlaßseite (15) des Wärmetauschers (2) und einem dem Wärmetauschbehälter (8) gegenüberliegenden Abschnitt der Wärmeleitwand (5) in den Kühlmittelkanal (4) ragende Rippen (10) erheben. - Vorrichtung nach einem der Ansprüche 4 bis 7,
dadurch gekennzeichnet, daß im Abgaskanal (3) an der Wärmeleitwand (5) angeordnete Rippen vorgesehen sind. - Vorrichtung nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, daß der Wärmetauscher (2) aus Aluminium besteht. - Vorrichtung nach Anspruch 9,
dadurch gekennzeichnet, daß der Wärmetauscher (2) ein einstückiges Gußbauteil ist. - Vorrichtung nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet, daß der Wärmetauscher (2) in eine Baugruppe (23) gasführender Leitungen integriert ist, welche aus der Abgasrückführungsleitung (13) und jeweils einem Zylinder der Brennkraftmaschine Frischgas zuführenden Frischgasleitungen (11) sowie einer die Frischgasleitungen (11) speisenden Verteilerleitung (12) besteht. - Vorrichtung nach Anspruch 11,
dadurch gekennzeichnet, daß die Baugruppe (23) mit den gasführenden Leitungen (11, 12, 13) aus dem gleichen metallischen Werkstoff besteht wie der Wärmetauscher (2) und mit diesem einstückig ausgeführt ist. - Vorrichtung nach Anspruch 11 oder 12,
dadurch gekennzeichnet, daß sowohl die Frischgasleitungen zu den Zylindern der Brennkraftmaschine und die Einlaßseite (15) des Wärmetauschers (2) als auch die Abgasrückführungsleitung (13) im weiteren Verlauf ausgehend vom Abgaskanal (3) des Wärmetauschers (2) und ein Einlaß der Verteilerleitung (12) mit gemeinsamen Flanschmitteln (16, 17) verbunden sind.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19641700 | 1996-10-10 | ||
| DE19641700A DE19641700C1 (de) | 1996-10-10 | 1996-10-10 | Vorrichtung zur Wärmeübertragung zwischen strömenden Medien für eine Brennkraftmaschine |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0836002A2 EP0836002A2 (de) | 1998-04-15 |
| EP0836002A3 EP0836002A3 (de) | 1998-11-04 |
| EP0836002B1 true EP0836002B1 (de) | 2002-01-16 |
Family
ID=7808317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97116598A Expired - Lifetime EP0836002B1 (de) | 1996-10-10 | 1997-09-24 | Vorrichtung zur Wärmeübertragung zwischen strömenden Medien für eine Brennkraftmaschine |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0836002B1 (de) |
| DE (2) | DE19641700C1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10119484B4 (de) * | 2001-04-20 | 2018-01-04 | Bayerische Motoren Werke Aktiengesellschaft | Flüssigkeitsgekühlte Brennkraftmaschine mit einem Abgasrückführsystem |
| ITBO20010761A1 (it) * | 2001-12-14 | 2003-06-16 | Magneti Marelli Powertrain Spa | Collettore di aspirazione per un motore a combustione interna provvisto di ricircolo dei gas di scarico |
| JP4641965B2 (ja) * | 2006-03-31 | 2011-03-02 | 本田技研工業株式会社 | 内燃機関のブローバイガス換気装置 |
| GB2436855A (en) * | 2006-04-05 | 2007-10-10 | David Davies | Combustion apparatus, eg diesel engine, with exhaust gas recirculation |
| CN113236451A (zh) * | 2021-05-27 | 2021-08-10 | 上海交通大学 | 一种利用排气管废气进行燃油加热的装置 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3034971C2 (de) * | 1979-10-09 | 1983-01-20 | Ford-Werke AG, 5000 Köln | Brennkraftmaschine mit zwei in V-Form angeordneten Zylinderreihen |
| JPS57198359A (en) * | 1981-05-29 | 1982-12-04 | Toyota Motor Corp | Intake air heater for engine |
| DE4105232C1 (de) * | 1991-02-20 | 1992-07-16 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | |
| US5490488A (en) * | 1995-04-05 | 1996-02-13 | Ford Motor Company | Internal combustion engine intake manifold with integral EGR cooler and ported EGR flow passages |
-
1996
- 1996-10-10 DE DE19641700A patent/DE19641700C1/de not_active Expired - Fee Related
-
1997
- 1997-09-24 DE DE59705997T patent/DE59705997D1/de not_active Expired - Fee Related
- 1997-09-24 EP EP97116598A patent/EP0836002B1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE59705997D1 (de) | 2002-02-21 |
| EP0836002A3 (de) | 1998-11-04 |
| DE19641700C1 (de) | 1997-10-30 |
| EP0836002A2 (de) | 1998-04-15 |
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